NEW YORK -- An anonymous tip that nearly landed Time magazine reporter Matthew Cooper in jail probably wasn't valuable enough to justify a promise of confidentiality, his editor said Tuesday. Speaking at a panel discussion in New York sponsored by Court TV, Norman Pearlstine, editor in chief of Time Inc., lamented that reporters covering Washington have become too quick to offer total anonymity in exchange for information. Confidentiality should be reserved for special circumstances, he said. "A 90-second conversation with the president's spin doctor, who was trying to undermine a whistle-blower, probably didn't deserve confidential source status," Pearlstine said.